package org.apache.maven.artifact;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  import java.io.File;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.regex.Matcher;
  
  import org.apache.maven.artifact.handler.ArtifactHandler;
  import org.apache.maven.artifact.metadata.ArtifactMetadata;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
  import org.apache.maven.artifact.versioning.ArtifactVersion;
  import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
  import org.apache.maven.artifact.versioning.OverConstrainedVersionException;
  import org.apache.maven.artifact.versioning.VersionRange;
  import org.codehaus.plexus.util.StringUtils;
  
  /**
   * @author Jason van Zyl
   */
  public class DefaultArtifact
      implements Artifact
  {
      private String groupId;
  
      private String artifactId;
  
      private String baseVersion;
  
      private final String type;
  
      private final String classifier;
  
      private volatile String scope;
  
      private volatile File file;
  
      private ArtifactRepository repository;
  
      private String downloadUrl;
  
      private ArtifactFilter dependencyFilter;
  
      private ArtifactHandler artifactHandler;
  
      private List<String> dependencyTrail;
  
      private volatile String version;
  
      private VersionRange versionRange;
  
      private volatile boolean resolved;
  
      private boolean release;
  
      private List<ArtifactVersion> availableVersions;
  
      private Map<Object, ArtifactMetadata> metadataMap;
  
      private boolean optional;
  
      public DefaultArtifact( String groupId, String artifactId, String version, String scope, String type,
                              String classifier, ArtifactHandler artifactHandler )
      {
          this( groupId, artifactId, VersionRange.createFromVersion( version ), scope, type, classifier, artifactHandler,
                false );
      }
  
      public DefaultArtifact( String groupId, String artifactId, VersionRange versionRange, String scope, String type,
                              String classifier, ArtifactHandler artifactHandler )
      {
          this( groupId, artifactId, versionRange, scope, type, classifier, artifactHandler, false );
      }
  
      public DefaultArtifact( String groupId, String artifactId, VersionRange versionRange, String scope, String type,
                              String classifier, ArtifactHandler artifactHandler, boolean optional )
      {
         this.groupId = groupId;
 
         this.artifactId = artifactId;
 
         this.versionRange = versionRange;
 
         selectVersionFromNewRangeIfAvailable();
 
         this.artifactHandler = artifactHandler;
 
         this.scope = scope;
 
         this.type = type;
 
         if ( classifier == null )
         {
             classifier = artifactHandler.getClassifier();
         }
 
         this.classifier = classifier;
 
         this.optional = optional;
 
         validateIdentity();
     }
 
     private void validateIdentity()
     {
         if ( empty( groupId ) )
         {
             throw new InvalidArtifactRTException( groupId, artifactId, getVersion(), type,
                 "The groupId cannot be empty." );
         }
 
         if ( artifactId == null )
         {
             throw new InvalidArtifactRTException( groupId, artifactId, getVersion(), type,
                 "The artifactId cannot be empty." );
         }
 
         if ( type == null )
         {
             throw new InvalidArtifactRTException( groupId, artifactId, getVersion(), type,
                 "The type cannot be empty." );
         }
 
         if ( ( version == null ) && ( versionRange == null ) )
         {
             throw new InvalidArtifactRTException( groupId, artifactId, getVersion(), type,
                 "The version cannot be empty." );
         }
     }
 
     private boolean empty( String value )
     {
         return ( value == null ) || ( value.trim().length() < 1 );
     }
 
     public String getClassifier()
     {
         return classifier;
     }
 
     public boolean hasClassifier()
     {
         return StringUtils.isNotEmpty( classifier );
     }
 
     public String getScope()
     {
         return scope;
     }
 
     public String getGroupId()
     {
         return groupId;
     }
 
     public String getArtifactId()
     {
         return artifactId;
     }
 
     public String getVersion()
     {
         return version;
     }
 
     public void setVersion( String version )
     {
         this.version = version;
         setBaseVersionInternal( version );
         versionRange = null;
     }
 
     public String getType()
     {
         return type;
     }
 
     public void setFile( File file )
     {
         this.file = file;
     }
 
     public File getFile()
     {
         return file;
     }
 
     public ArtifactRepository getRepository()
     {
         return repository;
     }
 
     public void setRepository( ArtifactRepository repository )
     {
         this.repository = repository;
     }
 
     // ----------------------------------------------------------------------
     //
     // ----------------------------------------------------------------------
 
     public String getId()
     {
         return getDependencyConflictId() + ":" + getBaseVersion();
     }
 
     public String getDependencyConflictId()
     {
         StringBuilder sb = new StringBuilder( 128 );
         sb.append( getGroupId() );
         sb.append( ":" );
         appendArtifactTypeClassifierString( sb );
         return sb.toString();
     }
 
     private void appendArtifactTypeClassifierString( StringBuilder sb )
     {
         sb.append( getArtifactId() );
         sb.append( ":" );
         sb.append( getType() );
         if ( hasClassifier() )
         {
             sb.append( ":" );
             sb.append( getClassifier() );
         }
     }
 
     public void addMetadata( ArtifactMetadata metadata )
     {
         if ( metadataMap == null )
         {
             metadataMap = new HashMap<>();
         }
 
         ArtifactMetadata m = metadataMap.get( metadata.getKey() );
         if ( m != null )
         {
             m.merge( metadata );
         }
         else
         {
             metadataMap.put( metadata.getKey(), metadata );
         }
     }
 
     public Collection<ArtifactMetadata> getMetadataList()
     {
         if ( metadataMap == null )
         {
             return Collections.emptyList();
         }
 
         return metadataMap.values();
     }
 
     // ----------------------------------------------------------------------
     // Object overrides
     // ----------------------------------------------------------------------
 
     public String toString()
     {
         StringBuilder sb = new StringBuilder();
         if ( getGroupId() != null )
         {
             sb.append( getGroupId() );
             sb.append( ":" );
         }
         appendArtifactTypeClassifierString( sb );
         sb.append( ":" );
         if ( getBaseVersionInternal() != null )
         {
             sb.append( getBaseVersionInternal() );
         }
         else
         {
             sb.append( versionRange.toString() );
         }
         if ( scope != null )
         {
             sb.append( ":" );
             sb.append( scope );
         }
         return sb.toString();
     }
 
     public int hashCode()
     {
         int result = 17;
         result = 37 * result + groupId.hashCode();
         result = 37 * result + artifactId.hashCode();
         result = 37 * result + type.hashCode();
         if ( version != null )
         {
             result = 37 * result + version.hashCode();
         }
         result = 37 * result + ( classifier != null ? classifier.hashCode() : 0 );
         return result;
     }
 
     public boolean equals( Object o )
     {
         if ( o == this )
         {
             return true;
         }
 
         if ( !( o instanceof Artifact ) )
         {
             return false;
         }
 
         Artifact a = (Artifact) o;
 
         if ( !a.getGroupId().equals( groupId ) )
         {
             return false;
         }
         else if ( !a.getArtifactId().equals( artifactId ) )
         {
             return false;
         }
         else if ( !a.getVersion().equals( version ) )
         {
             return false;
         }
         else if ( !a.getType().equals( type ) )
         {
             return false;
         }
         else if ( a.getClassifier() == null ? classifier != null : !a.getClassifier().equals( classifier ) )
         {
             return false;
         }
 
         // We don't consider the version range in the comparison, just the resolved version
 
         return true;
     }
 
     public String getBaseVersion()
     {
         if ( baseVersion == null && version != null )
         {
             setBaseVersionInternal( version );
         }
 
         return baseVersion;
     }
 
     protected String getBaseVersionInternal()
     {
         if ( ( baseVersion == null ) && ( version != null ) )
         {
             setBaseVersionInternal( version );
         }
 
         return baseVersion;
     }
 
     public void setBaseVersion( String baseVersion )
     {
         setBaseVersionInternal( baseVersion );
     }
 
     protected void setBaseVersionInternal( String baseVersion )
     {
         Matcher m = VERSION_FILE_PATTERN.matcher( baseVersion );
 
         if ( m.matches() )
         {
             this.baseVersion = m.group( 1 ) + "-" + SNAPSHOT_VERSION;
         }
         else
         {
             this.baseVersion = baseVersion;
         }
     }
 
     public int compareTo( Artifact a )
     {
         int result = groupId.compareTo( a.getGroupId() );
         if ( result == 0 )
         {
             result = artifactId.compareTo( a.getArtifactId() );
             if ( result == 0 )
             {
                 result = type.compareTo( a.getType() );
                 if ( result == 0 )
                 {
                     if ( classifier == null )
                     {
                         if ( a.getClassifier() != null )
                         {
                             result = 1;
                         }
                     }
                     else
                     {
                         if ( a.getClassifier() != null )
                         {
                             result = classifier.compareTo( a.getClassifier() );
                         }
                         else
                         {
                             result = -1;
                         }
                     }
                     if ( result == 0 )
                     {
                         // We don't consider the version range in the comparison, just the resolved version
                         result = new DefaultArtifactVersion( version ).compareTo(
                             new DefaultArtifactVersion( a.getVersion() ) );
                     }
                 }
             }
         }
         return result;
     }
 
     public void updateVersion( String version, ArtifactRepository localRepository )
     {
         setResolvedVersion( version );
         setFile( new File( localRepository.getBasedir(), localRepository.pathOf( this ) ) );
     }
 
     public String getDownloadUrl()
     {
         return downloadUrl;
     }
 
     public void setDownloadUrl( String downloadUrl )
     {
         this.downloadUrl = downloadUrl;
     }
 
     public ArtifactFilter getDependencyFilter()
     {
         return dependencyFilter;
     }
 
     public void setDependencyFilter( ArtifactFilter artifactFilter )
     {
         dependencyFilter = artifactFilter;
     }
 
     public ArtifactHandler getArtifactHandler()
     {
         return artifactHandler;
     }
 
     public List<String> getDependencyTrail()
     {
         return dependencyTrail;
     }
 
     public void setDependencyTrail( List<String> dependencyTrail )
     {
         this.dependencyTrail = dependencyTrail;
     }
 
     public void setScope( String scope )
     {
         this.scope = scope;
     }
 
     public VersionRange getVersionRange()
     {
         return versionRange;
     }
 
     public void setVersionRange( VersionRange versionRange )
     {
         this.versionRange = versionRange;
         selectVersionFromNewRangeIfAvailable();
     }
 
     private void selectVersionFromNewRangeIfAvailable()
     {
         if ( ( versionRange != null ) && ( versionRange.getRecommendedVersion() != null ) )
         {
             selectVersion( versionRange.getRecommendedVersion().toString() );
         }
         else
         {
             version = null;
             baseVersion = null;
         }
     }
 
     public void selectVersion( String version )
     {
         this.version = version;
         setBaseVersionInternal( version );
     }
 
     public void setGroupId( String groupId )
     {
         this.groupId = groupId;
     }
 
     public void setArtifactId( String artifactId )
     {
         this.artifactId = artifactId;
     }
 
     public boolean isSnapshot()
     {
         return getBaseVersion() != null
             && ( getBaseVersion().endsWith( SNAPSHOT_VERSION ) || getBaseVersion().equals( LATEST_VERSION ) );
     }
 
     public void setResolved( boolean resolved )
     {
         this.resolved = resolved;
     }
 
     public boolean isResolved()
     {
         return resolved;
     }
 
     public void setResolvedVersion( String version )
     {
         this.version = version;
         // retain baseVersion
     }
 
     public void setArtifactHandler( ArtifactHandler artifactHandler )
     {
         this.artifactHandler = artifactHandler;
     }
 
     public void setRelease( boolean release )
     {
         this.release = release;
     }
 
     public boolean isRelease()
     {
         return release;
     }
 
     public List<ArtifactVersion> getAvailableVersions()
     {
         return availableVersions;
     }
 
     public void setAvailableVersions( List<ArtifactVersion> availableVersions )
     {
         this.availableVersions = availableVersions;
     }
 
     public boolean isOptional()
     {
         return optional;
     }
 
     public ArtifactVersion getSelectedVersion()
         throws OverConstrainedVersionException
     {
         return versionRange.getSelectedVersion( this );
     }
 
     public boolean isSelectedVersionKnown()
         throws OverConstrainedVersionException
     {
         return versionRange.isSelectedVersionKnown( this );
     }
 
     public void setOptional( boolean optional )
     {
         this.optional = optional;
     }
 
 }